Golf club back cavity



FIG. 1 is a back plan view of our new golf club back cavity;

FIG. 2 is a heel side perspective view thereof;

FIG. 3 is a toe side perspective view thereof;

FIG. 4 is a heel side view thereof; and,

FIG. 5 is a cross-sectional view thereof.

The portion of the club head outlined with the dotted lines is not part of the back cavity and does not form any portion of the present invention. 

The ornamental design for a golf club back cavity, as shown and described. 